Abstract: Disclosed is a method and a device for improving the safety of a maritime platform, installed at sea or navigating at sea, including an observation of sea waves striking the maritime platform, an operation of the maritime platform being controlled via a control system. The method and device are suitable for: —acquiring elevation values of the surface of the sea at a plurality of points, making it possible to characterize at least one group of sea waves, a sea wave being likened to a wave defined by a period and an amplitude, —calculating at least one characteristic quantity of each group of waves, —comparing the calculated characteristic quantity to a hazard threshold, —if the comparison indicates the hazard threshold is crossed, raising an alert intended for the control system.

Abstract: Disclosed is a method and a device for improving the safety of a maritime platform, installed at sea or navigating at sea, including an observation of sea waves striking the maritime platform, an operation of the maritime platform being controlled via a control system. The method and device are suitable for: —acquiring elevation values of the surface of the sea at a plurality of points, making it possible to characterize at least one group of sea waves, a sea wave being likened to a wave defined by a period and an amplitude, —calculating at least one characteristic quantity of each group of waves, —comparing the calculated characteristic quantity to a hazard threshold, —if the comparison indicates the hazard threshold is crossed, raising an alert intended for the control system.

Abstract: The method consists of: A step of estimating a direction (D) of propagation of the swell and a propagation speed of the swell, a step of measuring the development of a characteristic value of the swell at at least one measuring point (P) upstream of the ship in the direction of propagation (D) by periodically measuring the value, a step of detecting a lull in the swell at the measuring point (P) using a measurement of the development of the characteristic value, including a measurement of a duration of a lull detected, and if a lull in the swell is detected at the measuring point (P): a step of calculating a time interval between the detection of the lull in the swell at the detected measurement point (P) and a moment in which the lull affects the movement of the ship (N), carried out, in particular, depending on the estimated speed of propagation of the swell.

Abstract: The method consists of: A step of estimating a direction (D) of propagation of the swell and a propagation speed of the swell, a step of measuring the development of a characteristic value of the swell at at least one measuring point (P) upstream of the ship in the direction of propagation (D) by periodically measuring the value, a step of detecting a lull in the swell at the measuring point (P) using a measurement of the development of the characteristic value, including a measurement of a duration of a lull detected, and if a lull in the swell is detected at the measuring point (P): a step of calculating a time interval between the detection of the lull in the swell at the detected measurement point (P) and a moment in which the lull affects the movement of the ship (N), carried out, in particular, depending on the estimated speed of propagation of the swell.